Gbe_Mdi3; Gbe_Link100; Gbe_Mdi1; Gbe_Mdi2 - Seco Qseven ATLAS User Manual

3.2.1.3 Gigabit Ethernet signals
The Gigabit Ethernet interface is realized on the module by using a TI Gigabit Ethernet PHY transceiver DP83867, which is interfaced to Intel processor through RGMII
interface.
Here following the signals involved in Gigabit Ethernet management
GBE_MDI0+/GBE_MDI0-: Media Dependent Interface (MDI) I/O differential pair #0
GBE_MDI1+/GBE_MDI1-: Media Dependent Interface (MDI) I/O differential pair #1
GBE_MDI2+/GBE_MDI2-: Media Dependent Interface (MDI) I/O differential pair #2, only used for 1Gbps Ethernet mode (not for 10/100Mbps modes)
GBE_MDI3+/GBE_MDI3-: Media Dependent Interface (MDI) I/O differential pair #3, only used for 1Gbps Ethernet mode (not for 10/100Mbps modes)
GBE_ACT#: Ethernet controller activity indicator, Active Low Output signal, electrical level +3.3V_A.
GBE_LINK#: Ethernet controller link indicator, Active Low Output signal, electrical level +3.3V_A.
GBE_LINK100#: Ethernet controller 100Mbps link indicator, Active Low Output signal, electrical level +3.3V_A.
GBE_LINK1000#: Ethernet controller 1Gbps link indicator, Active Low Output signal, electrical
level +3.3V_A.
These signals can be connected, on the Carrier board, directly to an RJ-45 connector, in
order to complete the Ethernet interface.
Please notice that if just a FastEthernet (i.e. 10/100 Mbps) is needed, then only MDI0 and
MDI1 differential lanes are necessary.
Please refer to the following schematics as an example of connection of Ethernet interface on
the carrier board, with TVS diodes specifically designed to protect sensitive components
which are connected to high-speed data and transmission lines from overvoltage caused by
ESD. In this example, it is also present GBE_CTREF signal connected on pin #2 of the RJ-45
connector. TI Giga
centre tap, therefore the signal GBE_CTREF is not available on Qseven
connector
ATLAS
ATLAS User Manual - Rev. First Edition: 1.0 - Last Edition: 1.2 - Author: S.O. - Reviewed by C.M. Copyright © 2023 SECO S.r.l.
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